France coach Bernard Laporte is setting out to prove Marseille was no fluke when he goes for a second triumph in a week over Clive Woodward's England.

The teams are gearing up for the World Cup and are likely to meet, if the form book holds, in the semi-finals of the competition.

Les Bleus gained a psychological edge on Saturday when they put an end to England's 14-match unbeaten run in the Marseille Velodrome with a tense and closely-fought 17-16 victory, even though the Six Nations champions were by no means at full strength.

Laporte has made wholesale changes with centre Yannick Jauzion and winger Christophe Dominici the only players to retain their places in what looks like a second-string 15 for Saturday's return match at Twickenham.

"We have 30 players and we want to show that they are all at the same level," Laporte said today.

"There is no such thing as a first team or a second team. They are both balanced with players who have different qualities but their potential is the same.

"As a consequence we are expecting the same performance on Saturday at Twickenham that we had last week.

"We want this team to be a success on the mental, collective and motivational sides like the one in Marseille. There is an interesting mixture of experienced players and of youth in it. We are confident we can beat England again."

Stade Francais' Brian Liebenberg, the surprise name in the 30-men World Cup squad announced by Laporte at the start of July, will earn his first cap with Les Bleus.

"Brian integrated very quickly and very well with the team," Laporte said.

"He is a clever and smart player, he likes the game.

"When he came on against Romania and England he brought a lot to the team that is why we were eager to see him over 80 minutes."

France thrashed Romania 56-8 two weeks ago in Lens. Laporte insists he will have no surprises for Woodward at Twickenham but warned his side against complacency.

"We are not planning to change our tactics and I don't think the English will, either," he said.

"We will have to be extremely strong mentally, this is the highest level.

"Rugby is a permanent fight, if we slacken off we will concede 40 points like Australia did two months ago."

England, with the expected return of their biggest stars, will start as favourites.

"If in the worst case we get beat, we will learn from it," Laporte said. "But this is an outcome that we are definitely not contemplating."